Mold for reactance-coil supports



April 28, 1925; 1,535,584

L. DORFMAN MOLD FOR REACTANCE COIL SUPPORTS Filed'June 16, 1922 5L3) lllllL;

- WITNESSES: 4 I INVENTOR flQC MQ/Q Leo Dorfman.

ATTORNEY Patented Apr. 28, 1925.

1,535,584 oarrtnsrares rarest OFFICE.

LEO DORFIVIJLN, Oil W'ITILKINSBUBG, PENNSYLVANIA, ASSIG-INOR TO VL ESTINGHOUSE ELECTRIC 8: MANUFACTURING COMPANY, A GORPOEATISN OF PENNSYLVANIA.

liiOLI) FOR REACTANCE-COIL SUPPORTS.

Application filed June 16, 1922. Serial No. 568,729.

1 0 all whom it may comer n:

Be it known that l, LEO DORFMAN, a citizen oi: the United States, and a resident of ll ilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Molds for ll eactance-Coil Supports, of which the fol. lowing a specification. My invention relates to molds and it has particular relation to collapsible molds for the coil-supporting portions of reactance coils. t

l lleretol oro, it has been customary, in the manufacture of reactance coils, to support the respective convolutions ot the coils by means of a plurality of superposed members or cleats provided with recesses or; notches adapted to receive and retain the coiled conductors and which are clamped together and arranged in radiallyextending stacks or tiers. This method ofconstructing reactance coils is unsatisfactory in that much time and manual labor is required to successively arrange the layers of cleats in position and to wind the coils thereon. 1F urthermore, the cleats employed for this purpose are constructed from relatively expensive refractory material, such as asbestos or the like, and .the cleats frequently become displaced laterally, which results in an unsightly structure. a

One oi the objects of my invention is to provide a mold, of the character set forth, by means 01" which the coil-supporting portions of a reactance coil may be quickly and easily molded from concrete and around a previously wound conductor.

Another object of my invention is to provide a device, of the character described, in which the mold functions to maintain the respective convolutionsof a previously wound coil in correct position during the molding operation. 1 i

A further object oi the invention is to provide a mold, of the character designated, which may be easily assembled in position and removed from a support and from between the convolutions ot' acoil at the conclusion of the molding operation.

In the accompanying drawing,

Figure l is a plan View of a reaotance coil constructed in accordance with my invention. and with the collapsible mold in position. I

Fig. 2 is a fragmentary side elevational view of one of the stacks of superposed molding units.

F is a view of the structure illustrated in F 2, viewed from a position at right angles thereto.

Fig. 4 is a fragmentary enlarged perspective view of two of the superposed 1nolding units.

Referring to the drawings, a mold constructed in accordance with my invention is illustrated as comprising an annular divided band 1 and a centrally-disposed collapsible core portion 2 upon which a plurality oi spaced and radially extending collapsible units 3 relation in spaced stacks or tiers.

y The band 1, which constitutes a supporting base for the outer ends of the. units 3,

preferably consists of a plurality of arcuate sections 4t the extremities of which are provided with flanges 5 adapted to be detachably secured together in abutting relation by means of i vertically extending channel members 6. V

The core member 2 is shown as comprising a plurality ot'separate, vertically extending walls 7 which are maintained in position, during the molding operation, by any suitable bracing means, such as wooden blocks, not shown.

Each of the units 3 comprises two con1- plementary side portions 8, of substantially L shape, andare provided with side walls 9 and Trent walls 10. The inner extremities otthe side walls 9 are provided with hers 1t.

are mounted in superposed The trader and lower eth cs of the side Walls 9 of the units 3 are. provided with a plurality ot spaced, substantially semicircular, notches or recesses 15 which are adapted to receive and retain the convoluill) Cit

Flanges 17 are secured to the lower edges of the side walls 9 and are adapted to over lap the upper edges of the side walls 9 of the adjacent units. The flanges 17 are also provided with notches 18 which register with the notches 15 formed in the lower edges of the walls 9 and coact with the notches 15 formed in the u Jper edges of the walls of the adjacent units to embrace the convolutions 16 ot the coils and to prevent the displacement th reef.

in operation, the arcuate sections a of the band 1, the walls 7 of the core member 2 and thelowermost units 3 of each of the tiers are first disposed in position in the order named. It will beunderstood that the band 1, when assembled, constitutes a; ,s upporting base for the outer ends '1 the lowermost units 3, the inner ends of the latter being supported by the walls 7. lhe units 8 are spaced from the molding floor a distance equal to the width of the band 1. T he initial convolutions of the concentric conductors are then wound about the core and within the notches 15. The-next layer of units 8 is then disposed in position and the second series of convolutions of the coil is wound in the notches ther of. The described operations are successively repeated until the desired number of turns of the con ductors are wound. Concrete, or other suitable molding,material, is then introduced within the band 1, to form a dislr having the width of the band 1 which constitutes the basetor the coil, and within the superposed and communicating units 3 and around the portions of the conductors disposed therein,

to form supporting columns for the windings of the coil.

Wh n the concrete is set, thesections 1 of the band 1 and the sidewalls 7 of the core portion-oi the'mold are first removed. The channel members 14, which secure the outer edges of the units 3 together, are then removed and the con'iplementary side portions 8 withdrawn, commencing with the uppermost units of each stack, by turning the same about a radial axis sui'liciently to disengage the notches 15 from the convolutions of the conductor.

A very inexpensive, efiicient and easily assembled collapsible mold is thus provided by means of which the labor and expense incidental to the manufacture of reaotance coils is considerably reduced.

1 claim as my invention:

1. A mold comprising a base portion and a plurality of spaced tiers of radially extending superposed sections mounted there- 2. A mold comprising a divided base portion, a collapsible centrally-disposed core portion and a plurality of radially extending divided molds mounted on said core portion and arranged in superposed relation above said base portion.

A mold comprising a divided base portion, a collapsible core portion disposed within said base portion and extending upwardly therefrom and a plurality 01": divided molds removably mounted upon said core :portion and extending in a radial direction over said base portion.

A mold comprising a plurality of radially disposed tiers oi -superposed sections.

5. A mold comprising a plurality of superposed layers of radially disposed sections.

(3. A mold comprising a base portion consisting of a plurality of sections detachably secured together, a vertically err-tending collapsible core member, a plurality of superposed scparate divided molds arranged radially about said core member, and means for securin said divided molds inoperative position and in alignment with each other.

'1 ii mold comprising a collapsible core member, a plurality of superposed divided molds provided with means tor detachable engagement with said core-member, said diting of a plurality of portions adapted to support a conductor and means 101' detaclmbly securing said portions together.

8. A mold comprising a centrally-disposed collapsible support,= a plurality of radially extending divided molds carried thereby, and arranged in superposed relation in spaced tiers, each ofsaid divided molds comprising a plurality of complementarymembers provided with flanged "front walls, and side walls provided with a tongue portion adapted to engage apertures in said collapsi ble support, and a vertically extending Cl1tl1- nel member adapted to embrace the flanged portion of superposed members of each tier to maintainsaid-members in operative position and in alignment with each other.

9. A mold comprising a plurality of superposed divided sections, one of the edges of the side walls of said sections being provided with notches adapted to receive and retain a conductor and the other edges thereof being offset and adapted to telescopically engage the edge of the side wall of the adjacent section.

In testimony whereof, I subscribed my name this 1922.

have hereunto 8th day oi nllllQ LEO DOBFMA'N. 

